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Topic: Squamous epithelium

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List of distinct cell types in the adult human body

Squamous

Epithelium

Cell division

Biological cell

Nerve cell

Muscle cell

Cell nucleus

Biological tissue

Mitochondrial disease

Cornea

Mitochondrion

Nucleolus

Fibrous connective tissue

Muscle

	Epithelium - Wikipedia, the free encyclopedia
		In zootomy, epithelium is a tissue composed of a layer of cells.
		The one cell layer of simple squamous epithelium is a minimal barrier to diffusion.
		Places where squamous cells can be found include the alveoli of the lungs, the filtration of the kidneys, and the major cavities of the body.
	en.wikipedia.org /wiki/Epithelium (594 words)

	Epithelia
		Epithelium is one of the 4 primary tissues of the body.
		Epithelium is found covering the numerous internal and external surfaces of the body and may also be modified to form glandular structures.
		Stratified squamous epithelium is found in the skin and in the passageways leading to the exterior, such as the mouth, anus and vagina.
	ect.downstate.edu /courseware/histomanual/epithelia.html (1472 words)

	EPXTHELXUX C &
		Entoderm is the source of origin for the epithelium of the esophagus, stomach, intestines and the structures, which open into the intestinal tract (liver, pancreas, and gallbladder).
		For example, the epithelium (epidermis) of the skin is classified as keratinized (cornified) stratified squamous; the epithelium of the esophagus is a moist type of stratified squamous; the lining of the stomach and intestines is simple columnar.
		The epithelium on the oral surface is stratified squamous.
	www.mc.vanderbilt.edu /histology/labmanual2002/labsection1/Epithelium03.htm (3083 words)

	Figures
		The transition from the columnar epithelium of the endocervix (en) to the stratified squamous epithelium of the exocervix is abrupt and defines the original squamocolumnar junction (oscj).
		The stratified squamous epithelium reacts to estrogen by proliferating and maturing, with cornification of the superficial cells.
		During this process, the squamous epithelium may overgrow the columnar papillae and obstruct the crypt openings to form mucous (Nabothian) cysts (nc), the mucin-distended cyst spaces are lined by low columnar endocervical cells.
	www.medscape.com /content/2003/00/44/98/449876/449876_fig.html (852 words)

	EPITHELIA
		The epithelium facing the lumen of the esophagus is an example of a stratified squamous epithelium.
		An epithelium always rests on a basal lamina, and this basal lamina is the interface between the epithelium and underlying connective tissue.
		Skin is another example of a stratified squamous epithelium, but unlike the esophagus or cornea, this epiethelium is not constantly wetted by tears or saliva/mucous.
	medocs.ucdavis.edu /CHA/402/labsyl/01/02.htm (2408 words)

	Cancer Information, Research, and Treatment for all Types of Cancer \| OncoLink
		The transformation zone is the area of actively maturing epithelium between the present squamocolumnar junction (SCJ) and the original squamous epithelium.
		Squamous epithelium derived from the evolution of columnar cells to squamous cells during the first 18-20 weeks of fetal age.
		The presence of columnar epithelium in the vaginal fornices or vagina.
	www.oncolink.upenn.edu /types/article.cfm?c=6&s=17&ss=131&id=6029 (1761 words)

	SIU SOM Histology INTRO
		Squamous epithelial cells are typically inconspicuous in cross section, appearing as thin lines with a bulge at the nucleus.
		A stratified squamous epithelium is quite thick, with squamous cells on the surface overlying deeper layers of taller cells.
		Simple squamous epithelium may be located at sites of rapid diffusion, such as the lining of lung alveoli, the lining of blood vessels (called endothelium), and at sites where very little activity is occuring, such as Bowman's capsule in the kidney and the lining of major body cavities (called mesothelium).
	www.siumed.edu /~dking2/intro/epith.htm (2143 words)

	Exercise 4: Epithelium
		Covering and lining epithelium is classified histologically on the basis of two criteria: the number of cell layers present and the shape of the cells in the top layer.
		Slides 7 and 11 illustrate the keratinization of stratified squamous epithelium.
		In pseudostratified epithelium, the general appearance is that of several layers, but in reality all of the cells reach the basement membrane, and the epithelium is truly a simple one.
	education.vetmed.vt.edu /Curriculum/VM8054/Labs/Lab4/Lab4.htm (1648 words)

	ASCCP - Practice Recommendations - Practice Management Materials (Site not responding. Last check: 2007-11-01)
		The squamous epithelium of the cervical portio is similar to that of the vagina, except that it is generally smooth and lacks rete pegs.
		The border between the metaplastic epithelium arising during the reproductive years and the original squamous epithelium is called the “original SCJ.” The TZ is the area of metaplastic epithelium between the original and new SCJs.
		The metaplastic epithelium adjacent to the new SCJ is the newest and the least mature squamous epithelium on the cervix.
	www.asccp.org /edu/practice/cervix/histology.shtml (2398 words)

	Urologic Pathology: Squamous Metaplasia (Site not responding. Last check: 2007-11-01)
		Squamous epithelium similar to that of vaginal mucosa is normally found in the trigone and bladder neck particularly in women and should not be regarded as metaplasia (Fig.
		Metaplastic squamous epithelium is commonly seen in a setting of chronic irritation such as stones, diverticula, nonfunctioning bladders, or schistosomiasis.
		Keratinizing squamous metaplasia (leukoplakia) constitutes a significant risk factor for the development of carcinoma, and most squamous cell carcinomas of the bladder arise from areas of keratinizing squamous metaplasia.
	www.afip.org /cgi-bin/edu/coursepage.pl?code=1&id=63 (99 words)

	Epithelium Lab (Site not responding. Last check: 2007-11-01)
		One surface of the tissue specimen on the slide is covered with a pseudostratified columnar epithelium, whereas the opposite side is covered by simple squamous epithelium.
		Note the differences in thickness of the epithelium on the two specimens and that on both the epithelium is covered by a layer of cellular material (keratin).
		Again you will note differences in thickness of the epithelium on the two specimens, this epithelium however is not covered by a cellular material as was seen in the examples of stratified squamous epithelium.
	courses.missouristate.edu /emh420f/unit_1/Epithelium_lab.htm (1225 words)

	Introduction to Colposcopy
		The original squamous epithelium is a featureless, smooth, pink epithelium.
		Epithelium is considered "always" squamous and was not transformed from columnar to squamous.
		The columnar epithelium is a single-cell layer, mucous producing, tall epithelium that extends between the endometrium and the squamous epithelium.
	lib-sh.lsuhsc.edu /fammed/atlases/colpoat.html (1874 words)

	SSAT - 2000 Abstract: 2252: Ultrastructural Characteristics of Regenerating Squamous Islands in Barrett’s Epithelium. (Site not responding. Last check: 2007-11-01)
		Biopsies from squamous epithelium from grossly normal esophagus in the same patient were used for comparison.
		Results: In none of the specimens of squamous islands was the typical three layered pattern of normal esophageal squamous epithelium identified.
		Apoptosis of cells with features characteristic of Barrett s epithelium was observed in the region immediately adjacent to immature squamous cells with lower concentration of glycogen granules and poorly developed junctional complexes.
	www.ssat.com /cgi-bin/abstracts/00ddw/2252.cgi?affiliation=other (356 words)

	[No title] (Site not responding. Last check: 2007-11-01)
		Note the tall height of the epithelium, the large number of cell layers and the characteristic dome cells of the free surface.
		Note the reduced height of the epithelium and the apparently fewer number of cell layers and the attenuation of the superficial cells.
		The height of the prominent cell type is tall columnar and it is this cell that possesses the stereocilia and the darker and elongated oval nuclei.
	www.georgetown.edu /dml/educ/micro/epith/epith.txt (1411 words)

	Cloacal Papillomas in Psittacine Birds: A Retrospective Histopathologic Review (Site not responding. Last check: 2007-11-01)
		Transitional epithelium was defined as stratified epithelium with areas of adjacent squamous and columnar morphology, with neither predominating in the papilloma.
		The coprodeum and urodeum are lined by columnar epithelium with goblet cells in most species, but the proctodeal lining may vary from columnar to stratified squamous epithelium.
		The presence of squamous and transitional epithelium in the majority of cases reflects clinical observations that cloacal papillomas commonly arise at or near the mucocutaneous junction adjacent to the vent.
	www.vet.uga.edu /IVCVM/1998/Stedman/Stedman.htm (1656 words)

	Epithelial Tissue
		We will begin with the simple epithelia, as they are easier to visualize, and then touch on pseudostratified columnar epithelium before we move on to the stratified squamous epithelium.
		Other places simple squamous epithelium can be found include; the glomerulus of the kidney, the walls of capillaries, and the alveoli of the lungs, to name a few.
		The cells of the basal layer of the epidermis (closest to the dermis) are cuboidal to columnar in shape.
	www.uoguelph.ca /zoology/devobio/210labs/epithelial1.html (939 words)

	2740 EPITHELIAL TISSUES (Site not responding. Last check: 2007-11-01)
		These cells show the irregular, flat shape characteristic of typical "squamous cells." The nucleus (A) is centrally located, the cell membrane (C) is very thin, and the cell is filled with cytoplasm (B).
		At the left, simple squamous tissue (A) line the walls of blood vessels; at the right it makes up the lung alveoli (A) wall.In both cases the cells are very thin.
		Observe that the surface cells (at B) are flattened (are squamous).
	www.unomaha.edu /hpa/2740epithelium.html (553 words)

	[No title]
		Dysplasias are diagnosed by microscopic examination of a biopsy specimen.
		SQUAMOUS EPITHELIUM (Squay-mus)..........The outermost layer of skin, which is 12-24 cell layers thick, located on a basement membrane.
		In normal squamous epithelium, there is a regular progression of the shape of the cells from large and round at the basement membrane to flattened at the surface.
	www.gyncancer.com /glossary.html (2824 words)

	Holistic Health Encyclopedia - L
		Squamous cell carcinoma is a common form of lung cancer, accounting for approximately one-third of all cases of bronchogenic carcinomas.
		Its histogenesis may be related to chronic inflammation and injury of the bronchial epithelium, which leads to replacement of the normal ciliated columnar epithelium by a squamous epithelium.
		This transformation from a glandular epithelium to squamous epithelium is known as squamous metaplasia.
	www.findhealer.com /glossary/L.php3 (6915 words)

	Colonization of the Stratified Squamous Epithelium of the Nonsecreting Area of Horse Stomach by Lactobacilli -- Yuki et ...
		squamous epithelial mucosa adjacent to the margo plicatus.
		Dense layer of bacteria on the keratinized stratified squamous epithelium of the nonsecreting portion of the stomach (a; hematoxylin and eosin stained; ×780) and adherent bacteria on epithelial cells obtained in scrapings (b; Giemsa stained; ×1,040).
		The gastrointestinal epithelium and its autochthonous bacterial flora.
	aem.asm.org /cgi/content/full/66/11/5030 (2313 words)

	EPITHELIUM
		Pseudostratified epithelium is found primarily in the respiratory system and is often referred to as "Respiratory Epithelium".
		It is NOT composed of successive layers of squamous cells, but consists of basal columnar, polymorphic, and surface squamous layers (Stratified Squamous non-keratinized 1).
		Stratified squamous keratinizing epithelium - This epithelium has the same morphology as stratified squamous non-keratinized, but with the outer layer undergoing a metamorphosis to tough non-living layer of keratin.
	lifesci.rutgers.edu /~babiarz/epithe.htm (764 words)

	Stratified Squamous
		The surface of the tongue is covered with a stratified squamous epithelium of many layers of cells.
		This is the corneal epithelium which consists of 4 - 6 rows of non - papillated stratified squamous epithelium.
		As mentioned before, this is non-keratinized because of the presence of the nucleated cells on the superior border of the epithelium.
	www3.umdnj.edu /histsweb/lab2/lab2stratifiedsquamous.html (572 words)

	[No title]
		where the epithelium is. First examine the cells covering the tips of the villi at low power.
		In general, a pseudostratified epithelium appears stratified because the nuclei are on
		Transitional epithelium is capable of marked distention, and is restricted to areas of the
	www.urmc.rochester.edu /smded/Histology/Manuals/Epithelium.html (1126 words)

	Epithelia and Tissue Lab
		Immediately underlying the stratified squamous epithelium of the epidermis is a thin layer of loose irregular connective tissue (i.e.
		Goblet cells are everywhere in the epithelium interspersed among the ciliated cells.
		Note the flattened appearance of the stratified squamous epithelium near the surface and contrast it later with transitional epithelium.
	www.fsu.edu /~histo/two~1.htm (2932 words)

	Stratified squamous keratinized epithelium (Site not responding. Last check: 2007-11-01)
		Although stratified squamous keratinized epithelium covers the entire surface of the body, most of it also includes hair, which makes the basic tissue structure harder to see.
		The bar indicates the thickness of the stratified squamous keratinized epithelium (sske).
		Notice that the nuclei of the cells in the bottom layers tend to have a round shape, but that the nuclei seem to become flatter as you move towards the surface.
	www.austin.cc.tx.us /histologyhelp/tissues/tg_stra_sq_ker_e.html (361 words)

	Histology Syllabus: Oral and Nasal Cavities (Site not responding. Last check: 2007-11-01)
		The epithelium throughout is stratified squamous, but may be keratinized or nonkeratinized depending on location and function.
		stratified squamous epithelium is bound to the tooth enamel at the base of the gingival sulcus or crevice by a "cuticle" which resembles a thick basal lamina.
		Taste buds are pale oval (barrel-like) sensory structures embedded in stratified squamous epithelium.
	medic.med.uth.tmc.edu /edprog/00000681.htm (1433 words)

	Roles of p63 in the diethylstilbestrol-induced cervicovaginal adenosis -- Kurita et al. 131 (7): 1639 -- Development
		In the cervix, coexisting squamous cervical epithelium retained the normal cervicovaginal phenotype and was negative for PR in the absence of E
		Metaplastic squamous cells in the uterus were positive for ER (not shown), p63 and K14 (H and I).
		mesenchymal induction, and the squamous cervicovaginal and columnar
	dev.biologists.org /cgi/content/full/131/7/1639 (5708 words)

	Laboratory Three: Epithelium II
		Observe the apical surface of the cells near the junction of the striated border with the rest of the epithelial cell.
		The dead (lacking nuclei) keratinized cells at the surface (squamous) are flat and serve as a basis for classification of this epithelium as squamous.
		Identify areas of the stratified squamous epithelium whereby cellular morphology as well as the cellular organization is atypical.
	medinfo.ufl.edu /year1/histo/review/lab03.html (1009 words)

	ANIMAL TISSUES (Site not responding. Last check: 2007-11-01)
		The epithelium of skin (external covering), the epithelium of the small intestine (internal lining), and the epithelium of blood vessels (internal lining) are examples of epithelial tissues.
		Therefore, the different types of epithelial tissues are simple and stratified squamous epithelium, simple and stratified cuboidal epithelium, and simple and stratified columnar epithelium.
		The outermost layers of squamous epithelium, called the stratum corneum, are non-living and serve to prevent excessive loss of water.
	www.usd.edu /biol/labs/101/tisu103.htm (2166 words)

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